When a Metal Is Illuminated by Light, Photoelectrons Are Observed $520 \mathrm {~nm}$

question 180

Multiple Choice

When a metal is illuminated by light, photoelectrons are observed provided that the wavelength of the light is less than $520 \mathrm {~nm}$ . What is the metal's work function? ( $c = 3.00 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } , h = 6.626 \times$ $10 ^ { - 34 } \mathrm {~J} \cdot \mathrm { s } , 1 \mathrm { eV } = 1.60 \times 10 ^ { - 19 } \mathrm {~J}$ )

• A) \(2.6 \mathrm { eV }\)
• B) \(2.8 \mathrm { eV }\)
• C) \(3.0 \mathrm { eV }\)
• D) \(2.4 \mathrm { eV }\)

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Definitions:

Underlying Security

An asset, such as a stock or bond, on which financial derivatives like options and futures are based.

Delta

In finance, it represents the ratio that compares the change in the price of an asset, usually a marketable security, to the corresponding change in the price of its derivative.

Gamma

A measure of the rate of change in an option's delta for a one-unit change in the price of the underlying asset.

Theta

In financial markets, it represents the rate of decline in the value of an option as time to expiration decreases, holding all else constant.